https://github.com/vovandreevik/stream-api

https://github.com/vovandreevik/stream-api

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• Host: GitHub
• URL: https://github.com/vovandreevik/stream-api
• Owner: vovandreevik
• Created: 2023-12-14T19:57:03.000Z (11 months ago)
• Default Branch: main
• Last Pushed: 2024-03-25T12:14:29.000Z (8 months ago)
• Last Synced: 2024-03-25T14:09:33.898Z (8 months ago)
• Language: Java
• Size: 3.91 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# StreamExample

StreamExample is a Java project that demonstrates various stream operations using Java 8 Streams and provides corresponding test cases.

## Table of Contents

- [Installation](#installation)

- [Usage](#usage)

- [Methods](#methods)

- [Tests](#tests)

## Installation

To use StreamExample in your project, you can follow these steps:

1. Clone this repository:

    ```bash

    git clone https://github.com/your_username/StreamExample.git

    ```

2. Import the project into your preferred Java IDE.

## Usage

The StreamExample project provides several utility methods for working with streams and collections in Java. You can use these methods in your own Java projects by importing the `StreamExample` class and calling the desired methods.

Example usage:

```java

import java.util.Arrays;

import java.util.List;

public class Main {

    public static void main(String[] args) {

        List numbers = Arrays.asList(1, 2, 3, 4, 5);

        double average = StreamExample.average(numbers);

        System.out.println("Average: " + average);

    }

}

```

## Methods

`average(List numbers)`

Calculates the average of a list of integers.

`upperCaseAndAddPrefix(List strings)`

Converts a list of strings to uppercase and adds a prefix to each string.

`uniqueSquares(List numbers)`

Filters unique integers from a list, squares them, and returns a list of unique squares.

`filterAndSortByLetter(Collection strings, char letter)`

Filters and sorts strings from a collection based on a specified letter.

`getLastElementOrThrowException(Collection collection)`

Gets the last element from a collection or throws an exception if the collection is empty.

`getLastElement(Collection collection)`

Gets the last element from a collection as an optional.

`sumOfEvenNumbers(int[] numbers)`

Calculates the sum of even numbers in an array.

`convertToMap(List strings)`

Converts a list of strings to a map where the first character of each string is the key and the remaining characters are the value.

## Tests

The project includes JUnit tests to verify the functionality of each method. You can run these tests to ensure that the methods work as expected.